This Power Twister From Energy Uses The High Grade Steel Construction With Comfortable Grips. It Is Suitable For Different Power And Movement Needs. Long Term Exercising Will Be Effective For Building Upper Body Strength, Chest, Shoulders And Arms. It Is An Ideal Addition To Your Collection Of Gym Equipments. Materials : Quality Carbon Steel Springs And Non-Slip Plastic Handle. 38 Roll Carbon Spring Stell Thread. Harness The Safty Rope In The Grip Onto Your Wrist Before Using, So As To Prevent Hitting Others. Perfect For Building Upper Body Strength. Ideal For Active Men And Women Who Exercise Daily At Their Home Or Office. Others : This Great Workout Accessory Will Help You Build Your Body Effectively. Maximum Pressure: 50Kg.